Hi Kool Keith!
I don't know how many people are still following this thread, since this discussion started and more or less ended ages ago. I'm still playing this game, but most people probably went over to Civ4.
Now on to the strategy for a warmonger in civ3, I usually play both expansions, but this doesn't really change the strategy much, although in Conquest the computer has been known to do good waterinvasions.
1. Paying for that huge army is always a problem. I'd rather not have a huge army if I can get away with it, rather I try for an effective army. I fight war based on Sun Tzus rules: First I find an enemy that I can handle. Then I start building up my forces to a level, where I can easily overwhelm one or three of his cities, the classical border buildup. During this time, it is important to do a lot of diplomacy and defenses to stop anyone from attacking you, while you iniate your attack on your intended prey.
2. You will need a couple of engineers for your army, builders that is. These are to build the road, to your newly conguered cities and to colonize cities you want to keep, but are too far into enemy culture to keep, or to increase the size of the city you build when you have turned to old one to rubble.
3.To get a huge army, a good economy is a key to sucess, even though this is selfevident. See to that you have plenty of mines, better technology and possibly a little higher tax then usual, when the war breaks out. When war arises be prepared to let it cost. War costs. Get as many units as possible onto the field and take as many cities as possible from your enemy. Often you should aim for cities, which are in close proximity to easy defended land and resources. Cut all enemy resource supplys, but mostly tactical resources, such as Iron or horses, this is a very high priority. Take out the enemies most productive cities and then you win.
The main idea is that the enemy will have the advantage in numbers on this level, no matter what you do. Therefore you have to go for quality. Cutting the enemy off from the cities you want to take is then a priority and likewise is getting your troops close to his cities as fast as possible. Enemy reinforcements is a bad thing, so killing of all roads to these cities are a good thing, ofcourse you'll have to rebuild them to conguer the rest of the enemys land, but that's another story. The only time, I ever build forts, is on the road towards the enemy, that I'm building myself.
Winning on emperor means that you'll have to settle for haveing less troops, but makeing some cities into early production factories, makes it possible for them to get quite a lot of extra units. Also don't waste troops against a target you are not planning to take, or on a mission where they aren't needed, don't send five knights to kill two phalanxes, unless they have nothing better to do. Ofcourse sometimes funny things happens, but that's no reason to play like they would happen.
Don't attack a city unless you can take it. It's never worth the losses, if you only kill off a few defenders. Instead siege the city, until enough troops has arrived to destroy it. If the enemy somehow manages to outproduce your army with one city, you are doing something wrong, either:
1. You let the computer reinforce the city, through enemy roads or worse railroads.
2. You aren't occupying his main mines with troops.
3. You are concentrating on two many cities at the same time.
I'm not saying the computer won't outproduce you, because he will, I am saying that in the special local area, were you are conguering, the enemy should have the slightest chance to outproduce you, even if he gets triple your production.